Merge pull request #344 from cconlon/spotbugs #192

Job	Run time
Linux x86 32-bit (Zulu JDK 17, --enable-jni --enable-all --disable-asm)	3m 14s
Linux x86 32-bit (Zulu JDK 17, --enable-jni --disable-asm)	3m 13s
	6m 27s

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